浙江农业学报 ›› 2019, Vol. 31 ›› Issue (3): 355-364.DOI: 10.3969/j.issn.1004-1524.2019.03.02

• 作物科学 • 上一篇    下一篇

几个杂交水稻品种蜡熟期剑叶光合特性研究

叶子飘1, 尹建华2, 陈先茂3, 安婷1, 段世华4,*   

  1. 1.井冈山大学 数理学院,江西 吉安 343009;
    2.江西省农业科学院 水稻研究所,江西 南昌 330200;
    3.江西省农业科学院 土壤肥料与资源环境研究所,江西 南昌 330200;
    4.井冈山大学 生命科学学院,江西 吉安 343009
  • 收稿日期:2018-06-14 出版日期:2019-03-25 发布日期:2019-04-08
  • 通讯作者: *段世华,E-mail: shihua_duan@aliyun.com
  • 作者简介:叶子飘(1964—),男,江西永新人,博士,教授,主要从事植物光合作用生理生态研究。E-mail: yezp@jgsu.edu.cn
  • 基金资助:
    国家自然科学基金(31560069); 江西省优势科技创新团队建设计划(20142BCB24010); 江西省现代农业科研协同创新项目(JXXTCX2015001-005); 国家重点研发计划(2016YFD0300108)

Investigation on photosynthetic characteristics of flag leaves of several hybrid rice cultivars in dough stage

YE Zipiao1, YIN Jianhua2, CHEN Xianmao3, AN Ting1, DUAN Shihua4,*   

  1. 1.Maths & Physics College, Jinggangshan University, Ji'an 343009, China;
    2.Rice Research Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
    3. Soil Fertilizer and Environmental Resources Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
    4. School of Life Sciences, Jinggangshan University, Ji'an 343009, China
  • Received:2018-06-14 Online:2019-03-25 Published:2019-04-08

摘要: 利用LI-6400便携式光合作用测量系统研究了杂交水稻深95优1326、五丰优1326和赣香优1326及保持系JR1326蜡熟期剑叶的光合特性。结果表明:五丰优1326的叶绿素含量比深95优1326和赣香优1326分别高出33.41%和16.83%。五丰优1326和深95优1326之间的最大电子传递速率或最大净光合速率不存在显著差异(P>0.05),但这两种水稻与赣香优1326之间差异显著(P<0.05)。五丰优1326水稻叶片捕光色素分子的最小平均寿命比深95优1326和赣香优1326多14.89%;深95优1326捕光色素分子的本征截面比五丰优1326多28.71%;深95优1326的瞬时水分利用效率比五丰优1326和赣香优1326分别多34.99%和16.71%。此外,本研究结果揭示了本试验所用水稻品种的光合能力不仅与叶绿素含量有关,还与本征光能吸收截面、处于最低激发态的最小平均寿命等有关。这些因素的共同作用决定了水稻的最大电子传递速率和最大净光合速率。因此,选育的水稻品种应具有高的本征光能吸收截面、短的处于最低激发态的最小平均寿命和较高的叶绿素含量等特性。

关键词: 水稻, 光合作用, 光合参数, 最小平均寿命, 有效光能吸收截面

Abstract: In order to investigate the photosynthetic characteristics of flag leaves of hybrid rice in dough stage, the gas exchange data of four hybrid rice cultivars (Shen95you1326, Wufengyou1326, Ganxiangyou1326 and restorer line JR1326) were performed by LI-6400 portable photosynthesis measurement system. The results showed that the chlorophyll content of Wufengyou1326 was 33.41% and 16.83% higher than that of Shen95you1326 and Ganxiangyou1326. There was no difference between the maximum electron transport rate of Wufengyou1326 and Shen95you1326 or the maximum net photosynthetic rate of Wufengyou1326 and Shen95you1326 (P>0.05). However, there was a significant difference between the two rice cultivars and Ganxiangyou1326 in the maximum electron transport rate and the maximum net photosynthetic rate (P<0.05). The minimum average life-time of the Wufengyou1326 of pigment molecules in the excited state was 14.89% longer than Shen95you1326 and Ganxiangyou1326, and the intrinsic cross-section of pigment molecules of Shen95you1326 was 28.71% higher than Wufengyou 1326, and the instantaneous water-use efficiency of Shenyou1326 was 34.99% and 16.71% more than that of Wufengyou1326 and Ganxiangyou1326. The results revealed that photosynthetic capacity of rice cultivars was not only related to chlorophyll content, but also to intrinsic absorption cross-section and minimum average life time in the lowest excited state. The interaction of these factors determined the maximum electron transport rate and the maximum net photosynthetic rate of rice. Therefore, the selected rice cultivars should have some special characteristics such as higher intrinsic absorption cross-section, shorter minimum average life time in the lowest excitation state and higher chlorophyll content.

Key words: rice, photosynthesis, photosynthetic parameter, minimum average life-time, effective absorption cross-section

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